How to make "mask mask" more fair

A few days ago, the second round of "Mask Online Appointment" channel in Suzhou was officially opened. Citizens of District 6 of Suzhou can participate in this appointment registration through "Healthy Suzhou Palm Up" and other. After winning the lot, they can go to the corresponding ward with a dynamic QR code and ID card. Buy a mask, the price of 5 masks is 6.5 yuan.

At present, masks are an indispensable material for epidemic prevention and control, and they are also necessary materials. Many cities in China have adopted similar methods to determine the eligibility of citizens to purchase, and how to distribute them fairly has become a topic of concern to citizens.

According to relevant experts, the distribution of masks through appointment registration, designated purchase or appointment registration, home delivery, or even online number signing is a helpless act in a special period, which has realistic and positive significance. For the public, this is also a kind of bottom-line protection, and it avoids the movement and gathering of people caused by panic buying masks, reducing the risk of possible cross infection.

In addition, through appointment registration and limited purchases, it can also help relevant departments grasp market demand, rationally allocate masks, avoid hoarding and price hikes, and alleviate excessive supply and demand.

How to ensure the fairness and justness of Yaohao, in addition to the credibility of the government that the Notary Office participates in supervision throughout, the "technical trust" of Yaohao is also an important support. At present, the "number-shaking technology" that can truly trace back to check, cannot be tampered with, and randomly sorts packets is the blockchain technology.

As the R & D subject of the first independent safe and controllable blockchain bottom platform "Indus Chain" approved by the National Financial Engineering Laboratory in China, the Suzhou Tongji Blockchain Research Institute established by Suzhou High-speed Rail New City and Tongji University Provided key technical support for Suzhou's "mask notarization" work.

It is reported that the two rounds of online registration for masks currently underway in Suzhou are developed by the institute. At the beginning of February, members of the R & D team of “Taohao Notarization System”, which was resumed in advance by the Suzhou Tongji Blockchain Research Institute, received the unified deployment of the new coronavirus-infected pneumonia epidemic prevention headquarters in Suzhou, and developed a set of lines in the shortest time The random lottery lottery notary system on the purchase of masks for appointment registration can be used for lottery of more than 500,000 samples at the same time.

It is worth noting that on March 25 last year, under the support of the Indus Chain Certificate of Deposit Platform, a real estate sales notarization and live broadcast was performed at a real estate site in Xiangcheng District, which is the first case in the country. The lottery notary system is a mature business for the institute. Prior to this, the "Industry Chain Notary Lottery System" has successfully supported the notary lottery of 59 real estate properties in Suzhou without technical problems.

The software engineer responsible for the development of the mask lottery system said that before any domestic blockchain company had carried out such a large number of concurrent application scenarios. "This time is different. The number of general real estate purchase eligibility samples is less than 1,000, and this time it is 500,000. Some local governments have even proposed that they can bear 1 million samples at one time."

The task is arduous and the time is urgent, leaving them only 5 days to develop, and there is no trial period before going online, but it must be guaranteed that there can be no mistakes. On February 10, Suzhou's first batch of online appointments and offline purchase of masks. On February 9, 5 days and 5 nights, the new "Industry Chain" shouting notarization system challenged more than 500,000 samples of concurrent demand scenarios for the first time. "Because there is no precedent in the country, no one knows whether it will be because of the amount of data. Large, resulting in inadequate computing response, system crashes and other unexpected conditions. "A technical staff of the Institute said.

On the day of the lottery, the effective number of citizens who had successfully registered for the registration was 543,384. With the launch of the lottery software, the developers and the notary staff of the Suzhou Zhongxin Notary Office all stared intently at the computer screen. The clenched fists were all sweaty. .

Finally, as each group of results is updated to the blockchain in real time, all technical requirements are fully met. The platform successfully shakes out 100,000 ID numbers that can be purchased offline for masks.

Subsequently, the technology was quickly promoted to all districts and counties in Suzhou as a typical sample. On February 14th and February 17th, two places in Suzhou High-tech Zone passed the "Indus Chain" respectively, and successfully obtained 10,000 offline mask purchase qualifications from 100,000 valid applications. The winning results were sent to each of them as soon as possible. On the mobile phones of successful citizens, it is ensured from the technical source that participants have exactly the same probability of winning.

It is understood that the Suzhou Tongji Blockchain Research Institute will not only continue to improve this lottery notarization system for more scenarios, but also provide this technology to governments at all levels with relevant needs during the epidemic period. Support the fight against epidemic prevention and control.

Xu Chenyi China Youth Daily, China Youth Daily reporter Li Chao Source: China Youth Daily